Is there an upper limit to black hole masses ?

@inproceedings{Natarajan2008IsTA,
  title={Is there an upper limit to black hole masses ?},
  author={Priyamvada Natarajan and Ezequiel Treister},
  year={2008}
}
We make a case for the existence for ultra-massive black holes (UMBHs) in the Universe, but argue that there exists a likely upper limit to black hole masses of the order of M ∼ 1010M⊙. We show that there are three strong lines of argument that predicate the existence of UMBHs: (i) expected as a natural extension of the observed black hole mass bulge luminosity relation, when extrapolated to the bulge luminosities of bright central galaxies in clusters; (ii) new predictions for the mass… CONTINUE READING

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